Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f9ac2ff280933c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-24 05:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7466767d5ef8db440aace96deb26197d SHA-1: ab6c33794e1d893790e63c87892a7280f23b03a3 SHA-256: 73f9ac2ff280933cfee20036c5551e72e214e343b6eda2a0a897c2b287f931a5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains text suggesting a lure for song downloads, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of multiple suspicious URLs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=aadukalam+padam+songs In PDF document text
    • http://files.nationalcapitalfencersclub.org/uploads/1/3/2/6/132680827/sokini.pdfIn PDF document text
    • http://files.ictw-kennel.com/uploads/1/3/1/4/131411147/8966642.pdfIn PDF document text
    • http://datokud.barngoddesspahrump.store/uploads/1/3/2/7/132740873/geruteviposesafenita.pdfIn PDF document text
    • http://buxasopaj.electrole.es/uploads/1/3/1/4/131406893/2377a0a20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2700/4577/files/guwezar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/tukamimupoberip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/75224669032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/berthold_city_bold_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/pofal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/zidisepuras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5430/9284/files/tetezajazefekiwikagij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/demon_s_great_hammer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/cockatrice_rs3_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 5236 bytes
SHA-256: 2ded62a089c1f9c98fb24ffe9c75e90243cf320ad5749dcba875a5e07b1ea115
font_01_sfnt_off00006d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D43 15108 bytes
SHA-256: 6ce7fb1abb2ca1c06bdb49ccbac405c61ced8e461822448205014f4d03b5dcac

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